Gen. Mark A. Milley, chairman of the Joint Chiefs of Staff, called China’s recent test of a hypersonic weapons system “very concerning” — and “very close” to a Sputnik moment as ...

Nearly seven decades after the Soviet Union’s Sputnik launch jolted America into the space age, ... Russia, despite its economic troubles, continues to develop anti-satellite weapons, ...

Earth’s first-ever artificial satellite Sputnik launched on October 4, 1957. In that moment, the Cold War between the United States and the Soviet Union transformed into a race to dominate not ...

When the United States joined Israel this weekend in attacking Iran’s nuclear sites, the outrage and condemnation flowed from ...

Russia is developing a space-based capability to attack satellites using a nuclear weapon, an aggressive move that has alarmed U.S. national security officials and lawmakers who worry that Russia ...